$277+ Cheap flights from Houston to Porto (OPO)
This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 10/21. Fares are subject to change and may not be available on all flights or dates of travel.
HOU — OPO
Aug 22 — Aug 291
Round-trip
1 adult, Economy
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Find cheap flights from Houston to Porto with Cheapflights
1. Tell us where you want to go
Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”2. Select your favorite providers
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Cheapest flights from Houston to PortoExplore the most affordable flight options available from Houston to Porto. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 23, 2026.
Explore the most affordable flight options available from Houston to Porto. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 23, 2026.
This Delta deal was found by Cheapflights users on 7/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/203:55 pm
IAH
- OPO
1 stop17h 30m
Delta
Fri 10/305:00 am
OPO
- IAH
1 stop14h 05m
Delta
Deal found 7/22![Delta logo]()
$769
This Delta deal was found by Cheapflights users on 7/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/2512:55 pm
IAH
- OPO
1 stop14h 10m
Delta
Tue 10/2711:15 am
OPO
- IAH
1 stop31h 55m
Delta
Deal found 7/22![Delta logo]()
$770
This Delta deal was found by Cheapflights users on 7/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/213:25 pm
IAH
- OPO
1 stop20h 55m
Delta
Tue 10/275:00 am
OPO
- IAH
1 stop14h 05m
Delta
Deal found 7/22![Delta logo]()
$773
This Mytrip deal was found by Cheapflights users on 7/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/2110:00 am
IAH
- OPO
1 stop15h 00m
Multiple Airlines
Wed 10/286:00 am
OPO
- IAH
2 stops23h 30m
Multiple Airlines
Deal found 7/21![Multiple Airlines logo]()
$778
This United deal was found by Cheapflights users on 7/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/274:10 pm
IAH
- OPO
1 stop24h 15m
Multiple Airlines
Fri 1/86:00 am
OPO
- IAH
1 stop18h 15m
Multiple Airlines
Deal found 7/22![Multiple Airlines logo]()
$783
This United Airlines deal was found by Cheapflights users on 7/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/248:20 pm
IAH
- OPO
1 stop32h 10m
United Airlines
Thu 10/296:00 am
OPO
- IAH
2 stops23h 30m
United Airlines
Deal found 7/22![United Airlines logo]()
$784
This KLM deal was found by Cheapflights users on 7/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/215:50 pm
IAH
- OPO
2 stops15h 40m
KLM
Tue 10/279:55 am
OPO
- IAH
2 stops17h 20m
KLM
Deal found 7/22![KLM logo]()
$788
This Expedia deal was found by Cheapflights users on 7/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/2712:00 pm
IAH
- OPO
2 stops24h 30m
Air Canada
Fri 1/86:00 am
OPO
- IAH
2 stops33h 05m
Air Canada
Deal found 7/22![Air Canada logo]()
$789
This Delta deal was found by Cheapflights users on 7/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/2111:20 am
IAH
- OPO
2 stops17h 10m
Delta
Fri 10/3011:30 am
OPO
- IAH
2 stops29h 12m
Delta
Deal found 7/22![Delta logo]()
$791
This Delta deal was found by Cheapflights users on 7/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/225:28 pm
HOU
- OPO
2 stops19h 47m
Delta
Sun 11/15:00 am
OPO
- HOU
2 stops24h 09m
Delta
Deal found 7/20![Delta logo]()
$902
This Expedia deal was found by Cheapflights users on 7/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/212:08 pm
HOU
- OPO
2 stops19h 52m
Iberia
Wed 10/288:40 pm
OPO
- HOU
2 stops28h 09m
Iberia
Deal found 7/20![Iberia logo]()
$930
This Delta deal was found by Cheapflights users on 7/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/1810:50 am
HOU
- OPO
2 stops22h 35m
Delta
Mon 8/245:00 am
OPO
- HOU
2 stops23h 05m
Delta
Deal found 7/19![Delta logo]()
$940
Best flights from Houston to PortoDiscover carefully curated flight deals from Houston to Porto that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated July 23, 2026.
Discover carefully curated flight deals from Houston to Porto that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated July 23, 2026.
This United Airlines deal was found by Cheapflights users on 7/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/1610:00 am
IAH
- OPO
1 stop15h 10m
United Airlines
Tue 10/2011:15 am
OPO
- IAH
2 stops32h 04m
United Airlines
Deal found 7/18![United Airlines logo]()
$811
This Delta deal was found by Cheapflights users on 7/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/225:28 pm
HOU
- OPO
2 stops19h 47m
Delta
Sun 11/15:00 am
OPO
- HOU
2 stops24h 09m
Delta
Deal found 7/20![Delta logo]()
$902
This British Airways deal was found by Cheapflights users on 7/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/316:14 pm
HOU
- OPO
2 stops19h 51m
British Airways
Mon 9/149:25 pm
OPO
- HOU
2 stops24h 18m
British Airways
Deal found 7/18![British Airways logo]()
$1,011
This United Airlines deal was found by Cheapflights users on 7/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/165:00 am
IAH
- OPO
2 stops20h 10m
United Airlines
Wed 10/2111:20 am
OPO
- IAH
2 stops30h 21m
United Airlines
Deal found 7/18![United Airlines logo]()
$815
This Delta deal was found by Cheapflights users on 7/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/1810:50 am
HOU
- OPO
2 stops22h 35m
Delta
Mon 8/245:00 am
OPO
- HOU
2 stops23h 05m
Delta
Deal found 7/19![Delta logo]()
$940
This United Airlines deal was found by Cheapflights users on 7/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/88:35 pm
IAH
- OPO
2 stops28h 25m
United Airlines
Tue 9/1512:15 pm
OPO
- IAH
2 stops31h 21m
United Airlines
Deal found 7/20![United Airlines logo]()
$917
This Delta deal was found by Cheapflights users on 7/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/96:00 am
HOU
- OPO
2 stops20h 30m
Delta
Tue 8/255:00 am
OPO
- HOU
2 stops23h 05m
Delta
Deal found 7/20![Delta logo]()
$980
This United Airlines deal was found by Cheapflights users on 7/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/1510:19 pm
IAH
- OPO
2 stops26h 41m
United Airlines
Thu 9/2411:50 am
OPO
- IAH
2 stops34h 58m
United Airlines
Deal found 7/19![United Airlines logo]()
$917
This Delta deal was found by Cheapflights users on 7/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/51:13 pm
HOU
- OPO
2 stops20h 12m
Delta
Fri 8/215:00 am
OPO
- HOU
2 stops23h 05m
Delta
Deal found 7/22![Delta logo]()
$985
This Delta deal was found by Cheapflights users on 7/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/146:00 am
HOU
- OPO
2 stops22h 30m
Delta
Mon 9/215:00 am
OPO
- HOU
2 stops23h 39m
Delta
Deal found 7/22![Delta logo]()
$996
This Delta deal was found by Cheapflights users on 7/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/105:20 pm
HOU
- OPO
2 stops16h 05m
Delta
Mon 8/245:00 am
OPO
- HOU
2 stops23h 05m
Delta
Deal found 7/20![Delta logo]()
$1,040
Last-minute flights from Houston to PortoDiscover last-minute flight deals from Houston to Porto. Data last updated July 23, 2026 and is based on user searches.
Discover last-minute flight deals from Houston to Porto. Data last updated July 23, 2026 and is based on user searches.
This Delta deal was found by Cheapflights users on 7/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/51:13 pm
HOU
- OPO
2 stops20h 12m
Delta
Fri 8/215:00 am
OPO
- HOU
2 stops23h 05m
Delta
Deal found 7/22![Delta logo]()
$985
This Gotogate deal was found by Cheapflights users on 7/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/99:10 pm
IAH
- OPO
1 stop30h 30m
Turkish Airlines
Tue 8/254:50 pm
OPO
- IAH
1 stop32h 25m
Turkish Airlines
Deal found 7/19![Turkish Airlines logo]()
$821
This Gotogate deal was found by Cheapflights users on 7/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/910:00 am
IAH
- OPO
2 stops20h 05m
Air Canada
Tue 8/2512:15 pm
OPO
- IAH
1 stop13h 23m
Air Canada
Deal found 7/20![Air Canada logo]()
$945
This Delta deal was found by Cheapflights users on 7/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/96:00 am
HOU
- OPO
2 stops20h 30m
Delta
Tue 8/255:00 am
OPO
- HOU
2 stops23h 05m
Delta
Deal found 7/20![Delta logo]()
$980
This Turkish Airlines deal was found by Cheapflights users on 7/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Turkish Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/109:15 pm
IAH
- OPO
1 stop30h 30m
Turkish Airlines
Mon 8/246:30 am
OPO
- IAH
1 stop18h 50m
Turkish Airlines
Deal found 7/22![Turkish Airlines logo]()
$876
This Delta deal was found by Cheapflights users on 7/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/105:20 pm
HOU
- OPO
2 stops16h 05m
Delta
Mon 8/245:00 am
OPO
- HOU
2 stops23h 05m
Delta
Deal found 7/20![Delta logo]()
$1,040
This Delta deal was found by Cheapflights users on 7/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/141:13 pm
HOU
- OPO
2 stops20h 12m
Delta
Tue 8/185:00 am
OPO
- HOU
2 stops23h 05m
Delta
Deal found 7/23![Delta logo]()
$1,196
This Delta deal was found by Cheapflights users on 7/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/1810:50 am
HOU
- OPO
2 stops22h 35m
Delta
Mon 8/245:00 am
OPO
- HOU
2 stops23h 05m
Delta
Deal found 7/19![Delta logo]()
$940
This FlightHub deal was found by Cheapflights users on 7/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/2912:14 pm
HOU
- OPO
2 stops26h 26m
British Airways
Sun 9/69:30 pm
OPO
- HOU
2 stops26h 14m
British Airways
Deal found 7/23![British Airways logo]()
$1,174
This Gotogate deal was found by Cheapflights users on 7/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/312:30 pm
IAH
- OPO
1 stop19h 20m
Turkish Airlines
Mon 9/146:30 am
OPO
- IAH
1 stop18h 45m
Turkish Airlines
Deal found 7/18![Turkish Airlines logo]()
$860
This Gotogate deal was found by Cheapflights users on 7/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/3110:00 am
IAH
- OPO
1 stop15h 00m
Multiple Airlines
Mon 9/76:20 am
OPO
- IAH
2 stops37h 15m
Multiple Airlines
Deal found 7/18![Multiple Airlines logo]()
$939
This British Airways deal was found by Cheapflights users on 7/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/316:14 pm
HOU
- OPO
2 stops19h 51m
British Airways
Mon 9/149:25 pm
OPO
- HOU
2 stops24h 18m
British Airways
Deal found 7/20![British Airways logo]()
$1,011
One-way flights from Houston to PortoSearch for one-way flight options from Houston to Porto. Find affordable one-way fares based on user searches. Data last updated July 23, 2026.
Search for one-way flight options from Houston to Porto. Find affordable one-way fares based on user searches. Data last updated July 23, 2026.
This Kiwi.com deal was found by Cheapflights users on 7/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/2112:21 pm
IAH
- OPO
3 stops25h 54m
Multiple Airlines
Deal found 7/19![Multiple Airlines logo]()
$277
This Expedia deal was found by Cheapflights users on 7/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/2110:00 am
IAH
- OPO
1 stop15h 00m
Air Canada
Deal found 7/19![Air Canada logo]()
$322
This Kiwi.com deal was found by Cheapflights users on 7/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/1912:53 pm
IAH
- OPO
3 stops47h 37m
Multiple Airlines
Deal found 7/20![Multiple Airlines logo]()
$420
This Kiwi.com deal was found by Cheapflights users on 7/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/278:44 pm
IAH
- OPO
3 stops44h 36m
Multiple Airlines
Deal found 7/18![Multiple Airlines logo]()
$435
This Delta deal was found by Cheapflights users on 7/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/276:00 am
HOU
- OPO
2 stops22h 25m
Delta
Deal found 7/18![Delta logo]()
$463
This KLM deal was found by Cheapflights users on 7/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/273:55 pm
IAH
- OPO
1 stop17h 35m
KLM
Deal found 7/18![KLM logo]()
$463
This Delta deal was found by Cheapflights users on 7/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/191:13 pm
HOU
- OPO
2 stops20h 12m
Delta
Deal found 7/20![Delta logo]()
$467
This KLM deal was found by Cheapflights users on 7/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/13:55 pm
IAH
- OPO
1 stop17h 30m
KLM
Deal found 7/19![KLM logo]()
$523
This United Airlines deal was found by Cheapflights users on 7/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/19:45 pm
IAH
- OPO
2 stops27h 25m
United Airlines
Deal found 7/22![United Airlines logo]()
$527
This Kiwi.com deal was found by Cheapflights users on 7/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 7/312:30 pm
IAH
- OPO
2 stops22h 30m
Multiple Airlines
Deal found 7/20![Multiple Airlines logo]()
$543
This Delta deal was found by Cheapflights users on 7/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/2710:50 am
HOU
- OPO
2 stops22h 35m
Delta
Deal found 7/21![Delta logo]()
$599
This Delta deal was found by Cheapflights users on 7/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/16:00 am
HOU
- OPO
2 stops20h 30m
Delta
Deal found 7/22![Delta logo]()
$649
Find flight deals from Houston to Porto
Discover tips and strategies to find the most affordable flight options for your journey from Houston (HO1) to Porto (OPO). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated July 23, 2026.
Round-trip from | $727 (Delta) |
|---|---|
One-way from | $277 (Kiwi.com) |
Popular in | July |
Cheapest in | November |
Average price | $1,312 |
Cheapflights Fare Finder
Customize your flight search to find flights from Houston to Porto that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated July 23, 2026.
Use the filters below to find and compare flights from Houston to Porto that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
HoustonPorto
IAH - OPO
IAHOPO
Houston George Bush Intcntl
Fri 10/16
10:00 am-7:10 am
1 stop15h 10m
Porto
Tue 10/20
11:15 am-1:19 pm
2 stops32h 04m
$811
HoustonPorto
IAH - OPO
IAHOPO
Houston George Bush Intcntl
Fri 10/16
5:00 am-7:10 am
2 stops20h 10m
Porto
Wed 10/21
11:20 am-11:41 am
2 stops30h 21m
$815
HoustonPorto
HOU - OPO
HOUOPO
Houston Hobby
Thu 10/22
5:28 pm-7:15 pm
2 stops19h 47m
Porto
Sun 11/1
5:00 am-12:09 am
2 stops24h 09m
$902
HoustonPorto
IAH - OPO
IAHOPO
Houston George Bush Intcntl
Tue 9/8
8:35 pm-7:00 am
2 stops28h 25m
Porto
Tue 9/15
12:15 pm-1:36 pm
2 stops31h 21m
$917
HoustonPorto
IAH - OPO
IAHOPO
Houston George Bush Intcntl
Tue 9/15
10:19 pm-7:00 am
2 stops26h 41m
Porto
Thu 9/24
11:50 am-4:48 pm
2 stops34h 58m
$917
HoustonPorto
HOU - OPO
HOUOPO
Houston Hobby
Tue 8/18
10:50 am-3:25 pm
2 stops22h 35m
Porto
Mon 8/24
5:00 am-10:05 pm
2 stops23h 05m
$940
HoustonPorto
HOU - OPO
HOUOPO
Houston Hobby
Sun 8/9
6:00 am-8:30 am
2 stops20h 30m
Porto
Tue 8/25
5:00 am-10:05 pm
2 stops23h 05m
$980
HoustonPorto
HOU - OPO
HOUOPO
Houston Hobby
Wed 8/5
1:13 pm-3:25 pm
2 stops20h 12m
Porto
Fri 8/21
5:00 am-10:05 pm
2 stops23h 05m
$985
HoustonPorto
HOU - OPO
HOUOPO
Houston Hobby
Mon 9/14
6:00 am-10:30 am
2 stops22h 30m
Porto
Mon 9/21
5:00 am-10:39 pm
2 stops23h 39m
$996
HoustonPorto
HOU - OPO
HOUOPO
Houston Hobby
Mon 8/31
6:14 pm-8:05 pm
2 stops19h 51m
Porto
Mon 9/14
9:25 pm-3:43 pm
2 stops24h 18m
$1,011
Showing 1-10 of 23 resultsSorted by cheapest first
Best time to book a flight from Houston to Porto
Have a flexible travel schedule? Discover the best time to fly to Porto from Houston with our price prediction graph.
HO1-OPO
IAH-OPO
HOU-OPO
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.
Cheapflights Insights
Everything you need to know about your flight from Houston to Porto
HO1-OPO
IAH-OPO
HOU-OPO
What is the cheapest month to book a flight from Houston to Porto?
Currently, January is the cheapest month in which you can book a flight from Houston to Porto (average of $682). Flying from Houston to Porto in December is currently the most expensive (average of $1,345). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.
How much does it cost to fly round-trip from Houston to Porto?
Airfare is below average for this route at the moment.
Houston to Porto flights typically cost between $1,012 and $1,390 in January.The cheapest round-trip price found within the last 5 days was $727 on Delta (Jan 12-Jan 19).
Reviews of airlines servicing Porto
Get insights into the airlines that provide service to Porto. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Porto. Reviews last updated July 23, 2026.
Peruse reviews from past customers who have flown with KLM and United Airlines from Houston to Porto to help guide your decision. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
Entertainment
7.2
Overall
7.8
Food
7.3
Boarding
7.8
Comfort
7.7
Crew
8.4
Reviews
1 / 20
6.0
GoodAnonymous,Apr 2026
OKC - ATL
Entertainment
7.2
Overall
7.8
Food
7.3
Boarding
7.8
Comfort
7.7
Crew
8.4
Reviews
1 / 20
6.0
GoodAnonymous,Apr 2026
OKC - ATL
Entertainment
7.2
Overall
7.8
Food
7.3
Boarding
7.8
Comfort
7.7
Crew
8.4
Reviews
1 / 20
6.0
GoodAnonymous,Apr 2026
OKC - ATL
Related info for your journey
Find useful and relevant information for your journey from Houston to Porto. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
Traveling to a place near Porto?
Book flights to Porto if you plan to visit one of these locationsVila Nova de Gaia
Arcos de Valdevez
Coimbra
Aveiro
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Alternative routes for Houston to Porto
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Complete your trip
Complete your trip to Porto by adding a car rental and/or hotel reservation to your travel itinerary.
Search flights from Houston to Porto by cabin class
Find flights from Houston to Porto, based on your preferred cabin class, be it economy, premium economy, business, or first class.
Houston and Porto flights
Browse other Houston and Porto flight options. Last updated on July 23, 2026.
Popular flight searches
Check out other popular destinations found by fellow travelers in 2026
Other flights to Porto
Explore flights to Porto departing from other origins. Flights are based on user searches made on Cheapflights and were last updated on July 23, 2026.
Top 2 airlines flying from Houston to Porto
Discover the top 2 airlines that operate flights from Houston to Porto. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated July 23, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$476 | Average$700 | FlexibilityNo cancel fee | On-time75% | |
| Cheapest$626 | Average$1,130 | FlexibilityNo cancel fee | On-time69% |